8. In hogs a gene that produces a white belt around the animal's body is dominant over its allele for a uniformly colored body. Another independent gene produces fusion of the two hoofs on each foot (an instance of syndactyly); it is dominant over its allele, which produces normal hoofs. Suppose a uniformly colored hog homozygous for syndactyly is mated with a normal-footed hog homozygous for the belted character. What would be the phenotype of the F1 generation? If the F1 individuals are allowed to breed freely among themselves, what genotypic and phenotypic ratios would you predict for the F2?
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genotypic ratios would be 50% syndactyly and 50% normal Show more…
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In cattle, the alleles for red coat color (R) and for white coat color (W) behave as co-dominants. When a red-coated animal is crossed with a white-coated one, an animal with both red and white hairs is produced. Thus, the heterozygote is intermediate or roan-colored. If a breeder has all three genotypes of cows and bulls, what would be the phenotype and genotype ratios in the F1 generation for each of the following crosses? a) roan x roan b) red x roan c) red x white
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